| A | B | 
|---|
| the heart is covered with what | pericardium | 
| 3 layers of the pericardium are | myocardium, endocardium and epicardium | 
| heart has 4 chambers known as | atrium (upper chambers) and ventricles (lower chambers) | 
| heart has what 4 valves | 2 AV (atrioventricular) valves and 2 semilunar vlaves | 
| THE LEFT CORONARY ARTERY BRANCHES INTO WHAT 2 ARTERIES | 2 circumflex branch (POSTERIOR HEART)and anterior inter-ventricular (ANTERIOR HEART)branch | 
| THE THREE DIFFERENT PARTS OF A BLOOD VESSEL ARE | TUNICA INTERNA, TUNICA MEDIA AND TUNICA EXTERNA | 
| arteries take oxygenated blood _______ from the heart | away | 
| veins take unoxengenated blood _____ the heart | back to | 
| space the heart is contained in is known as the | mediastinum | 
| left lung lobe has only 2 lobes while the right has 3 lobes  to accommodate the heart being | in between the 2 lungs | 
| the upper region of the heart is known as the | base | 
| the lower region of the heart is known as the | apex | 
| myocardium is the _______, _______ layer of the pericardium | middle, muscular | 
| endocardium is the _______ layer of the pericardium | inner | 
| epicardium is the _______ layer of the pericardium | outer | 
| where do the superior and inferior vena cava open into | right atrium | 
| what arteries supply blood to the heart muscle | coronary | 
| interatrial septum divides the _______ form the _______ | right atrium, left atrium | 
| blood flows from right atria into the right ventricle through what valve | Tricuspid also know as the right atrioventricular valve (AV valve) | 
| intraventricular septum seperates the ______ from the ______ | right ventricle, left ventricle | 
| blood from right ventricle goes to the lung through what valve | Pulmonary valve (right semilunar) | 
| blood coming back fromn the lung enters the ______ | left atrium | 
| blood flows from the left atria into the left ventricle through what valve | Bicuspid (left atria-ventricular (AV) valve | 
| from the left ventricle blood goes through what valve to enter the aorta | aortic valve (left semilunar) | 
| the _____ takes oxygenated blood to the body | aorta | 
| the two major arteries of coronary circulation are known as | right coronary artery and left coronary artery | 
| the great cardiac vein carries unoxegenated blood from  _______ into ______ and | heart muscle,  coronary sinus, back to the right atrium | 
| the great cardiac vein is divided into what 2 veins | great cardiac vein, posterior interventricular vein | 
| cardiac conduction pathway travels from | SA node to AV node to purkinjie fibers to wall of the heart | 
| capilaries take blood ____ from the heart | away |